temperature of 194K. On the other hand, when the sample temperature was raised to room temperature without evacuation, a considerable part of the absorbed C2H4 molecules was found to remain and to form a stable compound almost similar to that stated above. We are now studying the structure and the
Deposition of carbon-based coatings on the surface of carbon fibers
β Scribed by M. Digilov; K. Vilcev; A. Zhikharev; A. Kovalev; O. Maluchkov; S. Sternin; L. Ilizarov; V. Kostikov
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 666 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0008-6223
No coin nor oath required. For personal study only.
β¦ Synopsis
Deposition of carbon-based coatings on a continuously moving carbon fiber (CF) yarn is a new method for modifying the surface characteristics of the fibers. The coating is formed with the help of CO*laser by way of a precipitating gaseous phase containing a mixture of carbon and hydrogen, and at the same time passing a current directly through the CF. According to XPS and Auger spectroscopy data, the coating thus produced has the electron structure corresponding to that of a diamond-like phase, and, according to transmission electron diffraction data, contains the phase known as carbyne. Investigation of the mechanical properties of fibers with this coating revealed a significant increase in their breaking strength.
π SIMILAR VOLUMES
The relations between chemical vapor deposition (CVD) parameters and the resultant pyrolytic carbon microstructures have been examined for matrix deposition in fibrous carbon substrates. The parameters considered are temperature (1200-145O"C), pressure (20-630 Torr), C/H ratio (l/4-1/14), total flow
## Abstract **Summary:** Spinβdrawing yarn (SDY) and highβspeed spun (HSS) fibers were produced from recycled poly(ethylene terephthalate) pellets, and the oligomer deposition on the surface of fiber in supercritical carbon dioxide fluid was compared. The oligomer deposition was obvious for SDY, wh
Sic coatings prepared by chemical vapor deposition and from polycarbosilane (PCS) solution; also, SiO, and Al,O, coatings by Sol-Gel method were investigated in detail, to improve the oxidation resistance of carbon fibers as important reinforcement in advanced composites. A P-Sic coating was obtaine
AASTRACTS 331 ment. The electron microscope (both in the scanning and transmission modes) was used to examine the topography of both wet (60% HNOs, 118Β°C) and dry oxidized (air, 700Β°C) fibers as well as fracture surfaces of composites made with treated and untreated fibers. The flexural strength of